Method for transmitting data frame in wireless local area network and apparatus for the same
View Patent ↗A wireless device of transmitting a data frame in a WLAN is provided. The wireless device includes: a MAC unit generating a data frame; a PHY unit transmitting a wireless signal of the data frame; and a processor being operably coupled to the MAC unit and the PHY unit and controlling a set of TXVECTOR parameters. The processor is configured for: generating the data frame, the data frame including a data field having a service field and a very high throughput signal information (VHT-SIG-B); and transmitting a wireless signal of the data frame via a operating channel bandwidth. The data field is scrambled with a scrambling sequence, the scrambling sequence is generated based on a initial scrambling sequence and a generator polynomial. The service field is determined based on the set of TXVECTOR parameters, the TXVECTOR parameters including an control information for the service field.
1. A communication apparatus, comprising: a memory; and a processor operably coupled to the memory, to execute program instructions stored in the memory, wherein the processor, when executing the program instructions, is configured to: cause the apparatus to generate a very high throughput signal B (VHT-SIG-B) field and a data field; cause the apparatus to scramble the data field using a scrambler based on bits obtained using one or more of TXVECTOR (transmission vector) parameters to generate a scrambled data field c, wherein: the scrambled data field comprises a service field and a physical service data unit (PSDU), the VHT-SIG-B field comprises a first set of bits and tail bits, the service field comprises a second set of bits representing an initial state of the scrambler, a reserved bit and cyclic redundancy check (CRC) bits, a channel bandwidth for transmitting the VHT-SIG-B field and the scrambled data field is determined based on the one or more of the TXVECTOR parameters, and the CRC bits are calculated over the VHT-SIG-B field excluding the tail bits; and cause the apparatus to transmit the VHT-SIG-B field and the scrambled data field using the channel bandwidth.
2. The communication apparatus of claim 1 , wherein the first set of bits represents information about the PSDU.
3. The communication apparatus of claim 1 , wherein the second set of bits is seven bits long, and the CRC bits are eight bits long.
4. The communication apparatus of claim 1 , wherein the second set of bits is set to zero before scrambling the data field.
5. The communication apparatus of claim 1 , further comprising a transceiver, wherein the processor, when executing the program instructions, causes the transceiver to transmit the VHT-SIG-B field and the scrambled data field.
6. The communication apparatus of claim 1 , wherein the one or more of the TXVECTOR parameters indicate that a dynamic bandwidth is supported.
7. A communication method, the method comprising: generating a very high throughput signal B (VHT-SIG-B) field and a data field; scrambling the data field using a scrambler based on bits obtained using one or more of TXVECTOR (transmission vector) parameters to generate a scrambled data field t, wherein: the scrambled data field comprises a service field and a physical service data unit (PSDU), the VHT-SIG-B field comprises a first set of bits and tail bits, the service field comprises a second set of bits representing an initial state of the scrambler, a reserved bit and cyclic redundancy check (CRC) bits, a channel bandwidth for transmitting the VHT-SIG-B field and the scrambled data field is determined based on the one or more of the TXVECTOR parameters, and the CRC bits are calculated over the VHT-SIG-B field excluding the tail bits, and transmitting the VHT-SIG-B field and the scrambled data field using the channel bandwidth.
8. The method of claim 7 , wherein the first set of bits represents information about the PSDU.
9. The method of claim 7 , wherein the second set of bits is seven bits long, and the CRC bits are eight bits long.
10. The method of claim 7 , wherein the second set of bits is set to zero before scrambling the data field.
11. The method of claim 7 , wherein the one or more of the TXVECTOR parameters indicate that a dynamic bandwidth is supported.
12. A communication method, the method comprising: receiving a very high throughput signal B (VHT-SIG-B) field and a scrambled data field using a channel bandwidth; and processing the VHT-SIG-B field and the scrambled data field, wherein: the scrambled data field is scrambled using a scrambler based on bits obtained using one or more of TXVECTOR (transmission vector) parameters, the scrambled data field comprises a service field and a physical service data unit (PSDU), the VHT-SIG-B field comprises a first set of bits and tail bits, the service field comprises a second set of bits representing an initial state of the scrambler, a reserved bit and cyclic redundancy check (CRC) bits, the channel bandwidth for receiving the VHT-SIG-B field and the scrambled data field is determined based on the one or more of the TXVECTOR parameters, and the CRC bits are calculated over the VHT-SIG-B field excluding the tail bits; and descrambling the scrambled data field to generate a data field, wherein the VHT-SIG-B field and the scrambled data field are transmitted from a transmitter.
13. The method of claim 12 , wherein the first set of bits represents information about the PSDU.
14. The method of claim 12 , wherein the second set of bits is seven bits long, and the CRC bits are eight bits long.
15. The method of claim 12 , wherein the second set of bits is set to zero before scrambling the data field.
16. The method of claim 12 , wherein the one or more of the TXVECTOR parameters indicate that a dynamic bandwidth is supported.
17. A communication apparatus, comprising: a memory; and a processor operably coupled to the memory, wherein the processor, when executing program instructions stored in the memory, is configured to: cause the apparatus to receive a very high throughput signal B (VHT-SIG-B) field and a scrambled data field using a channel bandwidth; and p process the VHT-SIG-B field and the scrambled data field, wherein: the scrambled data field is scrambled using a scrambler based on bits obtained using one or more of TXVECTOR (transmission vector) parameters, the scrambled data field comprises a service field and a physical service data unit (PSDU), the VHT-SIG-B field comprises a first set of bits and tail bits, the service field comprises a second set of bits representing an initial state of the scrambler, a reserved bit and cyclic redundancy check (CRC) bits, the channel bandwidth for receiving the VHT-SIG-B field and the scrambled data field is determined based on the one or more of the TXVECTOR parameters, and the CRC bits are calculated over the VHT-SIG-B field excluding the tail bits; and descramble the scrambled data field to generate a data field, wherein the VHT-SIG-B field and the scrambled data field are transmitted from a transmitter.
18. The communication apparatus of claim 17 , wherein the first set of bits represents information about the PSDU.
19. The communication apparatus of claim 17 , wherein the second set of bits is seven bits long, and the CRC bits are eight bits long.
20. The communication apparatus of claim 17 , wherein the second set of bits is set to zero before scrambling the data field.
21. The communication apparatus of claim 17 , wherein the one or more of the TXVECTOR parameters indicate that a dynamic bandwidth is supported.
22. A communication device for a station, the device comprising: a memory; and a processor operably coupled to the memory, to execute program instructions stored in the memory, wherein the processor, when executing the program instructions, is configured to: cause the station to generate a very high throughput signal B (VHT-SIG-B) field and a data field; cause the station to scramble the data field using a scrambler based on bits obtained using one or more of TXVECTOR (transmission vector) parameters to generate a scrambled data field c, wherein: the scrambled data field comprises a service field and a physical service data unit (PSDU), the VHT-SIG-B field comprises a first set of bits and tail bits, the service field comprises a second set of bits representing an initial state of the scrambler, a reserved bit and cyclic redundancy check (CRC) bits, a channel bandwidth for transmitting the VHT-SIG-B field and the scrambled data field is determined based on the one or more of the TXVECTOR parameters, and the CRC bits are calculated over the VHT-SIG-B field excluding the tail bits; and cause the station to transmit a signal using the channel bandwidth, the signal comprising the VHT-SIG-B field and the scrambled data field.
23. The communication device of claim 22 , wherein the first set of bits represents information about the PSDU.
24. The communication device of claim 22 , wherein the second set of bits is seven bits long, and the CRC bits are eight bits long.
25. The communication device of claim 22 , wherein the second set of bits is set to zero before scrambling the data field.
26. The communication device of claim 22 , wherein the one or more of the TXVECTOR parameters indicate that a dynamic bandwidth is supported.